Door-opener.



UNITED STATES Patented October 11, 1904.

PATENT OFFICE.

DOOR-OPENER.

SPECIFICATION forming part of Letters Patent N 0. 772,060, dated October 11, 1904.

Application filed April 14, 1903.

T (LZZ whom it may concern.-

Be it known that I, GEORGE RISOH'MULLER, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Door-Openers, of which the following is a specification.

My invention relates to an improved dooropener for unlatching and opening doors from a distant point. It is especially adapted for use in buildings containing flats where the street-door is to be opened from an upper flat without descending to the door for that purpose.

My improved door-opener is especially intended for use with doors which are closed by a door-check, the object of my invention being to provide a device of this character which shall be cheap and simple in construction and efl ective in operation.

My invention therefore resides in the novel construction, combination, and arrangement of parts for the above ends hereinafter fully specified, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side view of the door-jamb having my device applied thereto. Fig. 2 is a front view of the door-jamb, the casing of the door being removed. Fig. 3 is a horizontal section on the line A A of Fig. 2. Fig. 4 is a similar view showing the parts in operation. Fig. 5 is a horizontal section on the line B B of Fig. 2. Fig. 6 is a similar view showing the parts in operation.

Referring to the drawings, 1 represents the striking-plate,insterted in the face of the doorjamb 2 in the usual manner. Behind said striking-plate in the front face of the doorjamb and behind the casing 31 is inserted a plate 3, having a depressed or sunk portion 4:, from which extends rearwardly or laterally at right angles to said plate an arm 5. Upon said arm is pivoted, as shown at 6, the rear arm 7 of a toggle-lever 8, the front arm 9 having a slot 10 therein, through which passes a stud 11, secured upon the rear side of the depressed portion 4 of the plate, said stud forming a guide for said front arm 9. A spring 12, attached to any suitable support 13,

Serial No. 152,506- (No model.)

projecting inwardly from the door-jamb, and also attached to an eye 14 in an extension of the rear arm, serves to normally draw said toggle lever upward, thereby drawing the outer end of the lever inward. hen said toggle-lever is depressed, which is done by means of a wire 15, attached to said eye 14, the end of said toggle-lever moves outward against the end of the door-latch 16, the ex tent of its outward movement being suflicient to push said latch into the door, so as to clear the striking-plate.

Said wire 15 is drawn down by means of a link 18, secured at its lower end to a spring 19, attached to a bell-crank lever 20, the other arm of said lever being attached to a wire 21, running to a distant point. The spring 19 is sufficiently strong to transmit the force necessary to open the door under normal conditions, but yields when it is attempted to open the door from a distance at a time when the door is locked or its opening is prevented from other causes. Under the latter conditions the pull would have the effect of simply stretching the spring without breaking any of the parts.

The link 18 is slotted, as shown at 22, and through said slot passes a stud 23 on an arm 24 of a lever pivoted at 25 upon a plate 26, the other arm of said lever being first bent parallel with the pivot of the lever, as shown at 27, and then having a finger 28 extending from said parallel portion in a curve about said pivot as center, terminating in a knob 29, which normally rests in a hole 30 in the plate 26. The portion of the plate through which said hole passes is that which rests against the surface of the jamb, against which the door abuts in closing.

It will be seen that after the pull has been suflicient to straighten the toggle-lever to push the latch into the door clear of the strikingplate the link 18 will have descended so that the upper end of the slot 22 reaches the stud 23, and a further pull has the effect of cansing said link to actuate said lever, thereby causing said finger 28 to rock through said opening 30 and push the door, opening it slightly, thus intimating to the person desiring admission from the street that the door has been opened and that he is free to enter. Upon releasing the pull the parts immediately return to their original position under the action of the spring 12.

By reason of this construction the device can be made very cheaply and without the necessity of making any change in the ordinary construction of a striking-plate.

I claim- 1. In a door-opener, the combination, with the latch of the door, of a device movably mounted adjacent to said latch and arranged in its movement to push said latch inward to clear the striking-plate, a device also movably mounted and having a part arranged to engage the edge of the door to push the door open, a connection between the two devices whereby they may be operated in succession, first to unlatch the door and then to push the door open, and means for transmitting to said devices from a distant point force applied at said distant point to operate said devices, substantially as described.

2. In a device of the character described, the combination of a lever movably mounted upon the door-jamb adjacent to the free edge of the door and having a part arranged to engage the tree edge of a door to push it open, a lever having a part arranged to engage the latch of the door to push it in to clear the striking-plate, a wire connecting said levers, and means for transmitting to said levers from a distant point force applied at said distant point to operate said levers, substantially as described.

3. In a device of the character described, the combination of a lever for pushing the latch inward to clear the striking-plate, a lever for pushing open the door, a slotted connection between said levers, and means for transmitting to said levers from a distant point force applied at said distant point to operate said levers, substantially as described.

4. In a device of the character described, the combination of a toggle-lever having its movable end arranged to engage the latch of the door to push it inward, a lever having a finger arranged to engage the edge of the door to push it outward, a link connected with the toggle-lever and having a slotted engagement with the second lever, and means for transmitting to said levers from a distant point force applied at said distant point to operate said levers, substantially as described.

5. In a door-opener, the combination of the latch of the door, of a device movably mounted adjacent to said latch and arranged in its movement to push said latch inward to clear the striking plate, a device also movably mounted and having the part arranged to engage the edge of the door to push the door open, means whereby the two devices may be operated in succession, first to unlatch the door and then to push the door open, and means for transmitting to said devices from a distant point force applied at said distant point to operate said devices, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

G. RISOHMULLER.

Witnesses:

FRANoIs M. WRIGHT, Bnssm GORFINKEL. 

